<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <script src="d3.v5.min.js"></script>
  <style>
    .container {
      width: 200px;
      height: 200px;
      background: #efefef;
    }

    .bar {
      width: 30px;
      display: inline-block;
      background: greenyellow;
      /* height: 100px; */
      vertical-align: bottom;
      position: relative;
    }

    .bar span {
      position: absolute;
    }
  </style>
</head>

<body>
  <div id="app">
    <!-- <div class="bar"></div> -->
  </div>

  <script>

    var dataset = [];
    var container = d3.select('#app')

    d3.csv('./data.csv').then((data) => {
      dataset = data.columns;
      container.selectAll('div')
        .data(dataset)
        .enter()
        .append('div')
        .style('margin-left', '5px')
        .attr('class', 'bar')
        .style('height', (d) => {
          return d + 'px';
        })
        .append('span')
        .text(function (d) {
          return d;
        })
        .style('left', (30 - 20) / 2 + 'px')
        .style('top', function (d) {
          if (d < 20) {
            return '-25px';
          }
        })
        .style('color', function (d) {
          if (d < 20) {
            return 'red';
          }
        })

    })







  </script>

</body>

</html>